测量声速实验中使用驻波法和比较相位差法在示波器读数上误差的比较  

Comparisons between Standing Wave Method and Comparing Phase Difference Method in Measuring Sound Velocity in Oscilloscope Reading Error

作　　者：文子曈 易晨阳 

机构地区：[1]东南大学成贤学院

出　　处：《科学咨询》2019年第42期102-103,共2页

摘　　要：目的比较驻波法和比较相位差法在示波器上读数的误差大小。方法比较由计算得出的两种测量方法的函数图形。结果在人眼误差Δ→0时,比较相位差法的函数图形斜率远小于驻波法的函数图形的斜率。结论驻波法在示波器读图时产生的误差Δ比相位比较法更大。Purpose Compare the errors of standing wave method and phase difference method in oscilloscope reading.Method Compare the function graphs of the two measurement methods.Result When the error from the naked-eyeΔ→0,the slope of the function figure of the comparative phase difference method is much smaller than that of the standing wave method.Conclusion The error Δ of standing wave method in oscilloscope reading are larger than that of phase comparison method.

关 键 词：声速 驻波法 比较相位差法 示波器 误差 

分 类 号：G63[文化科学—教育学]